Doctors can use Cowling's Rule to determine the correct dosage of a drug to prescribe to a child: D(a + 1) 24 where D is the adult dosage, d is the child dosage, and a is the age of the child. If the adult dosage is 630 milligrams and the child's dosage is 446.25 milligrams, how old is the child? d = I

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A: Martha is 48 year old.   The detailed solution is as follows below:

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